As the title says, this shawl is made one stepped section at a time. The foundation chain is at the bottom of the shawl and two pattern blocks wide. Adding chains at the beginning and the end of the row once per repeat adds width and height. The stairstep edges are an unusual variation on a traditional triangular shawl shape.

Errata: a line of type is missing at the end of Row 5. It should read - ”…Ch 3, turn at end of Row 4; end off, turn work at end of Row 5.” At the start of Row 6, you ch 18 (as specified), work across the top of the Row 5 as directed, then ch 20 and turn. You wind up with a long chain on either side of the row.